Starting system



E. H. SCHWARZ.

STARTING SYSTEM.

APPLICATION msn JULY s. 1918. RENEWED OCT. 4. 1919.

1,4059%; Patented Feb. 7, 1922 33 BATTER/E8 "Ml nesses I I .[n e for UNITED STATES PATENT OFFICE.

ELIEB H. SGHWZAB-Z,v OF GLEN ROCK, NEW ASSIGNOR TO THE DAYTON ENGI- NEERING LABORATORIES COMPANY, OF DAYTON, OHIO.

STARTING SYSTEM.

Specification of Letters Patent. Patented Feb, '1, 1922.

Application filed July 5, 1918, Serial No. 243,319. Renewed October 4, 1919. Serial No. 328,606.

To all whom it may comer-n:

Be it known that I, ELMER H. ScHwAnz, a citizen of the United States of America, residing at Glen Rock, county of Bergen, State of New Jersey, have invented certain new and useful Improvements in Starting Systems, of which the following is a full. clear, and exact description.

This invention relates to starting systems for engines of the internal-combustion or explosion type, and more particularly to systems in which a starting motor is employed for cranking the engine and an electrical heating coil is used in the intake of the engine to assist in warming up the fuel charge during starting.

One of the objects of the present invention is to provide a suitable and convenient apparatus for controlling the electrical circuits to the starting motor'and to the electrical heating coil. In carrying out this aim of the invention two circuit controlling devices are constructed to be operated by foot pressure and are located so that by moving both of the devices by the foot, the starting motor and the heating coil maybe simultaneously put into operation. The circuits are so arranged that operation of one of the controlling devices causes the motor to crank the engine but the circuits are arranged so that the heating device cannot be brought into operation unless the starting motor is connected with a current source to crank the engine.

Other and further objects of the invention will be apparent from the following description of a preferred embodiment thereof, reference being made to the accompanying drawing which shows a side view of the engine provided with a starting motor, the motor and other starting elements being shown in diagrammatic form.

Referring to the drawing, 20 designates an internal-combustion engine having a carburetor 21 cooperating with the intake manifold 22. The main air intake of the carburetor is shown at 23, and is provided with an electric heater 24, the heating elements being shown at 25.

30 designates the starting motor which is adapted to start the engine through the agency of the driving pinion 31. which cooperates with thegear 32 on the flywheel 33. 34 designates the storage battery which furnishes current for the starting motor. 35 designates the starting switch having stationary contact elements 36 and 37 insulated from one another, and movable contact 38 mounted on plunger 39 which slides through the floor-board 60. Spring 39 serves to maintain the contact elements of the switch 39 normally apart. 7

The switch 40 which controls the heater 24 includes stationary contacts 41 and 42, and a movable contact 43 mounted on a plunger 44. The spring 45 by cooperating with the head of plunger 44 serves to yieldingly maintain the said contacts normally in engagement.

The starting circuit is as follows: from the battery 34, through wire 46, to brush 47, through armature 48, and the motor 30. through brush 47, wire 49, field windings 50 and 51, wire 52, wire 53, contact elements 42, 43 and 41 of switch 40, wire 54, across contacts 36 and 37 by means of contact 33. and through wire to the battery 34.. shunted around the switch 40 is the heating circuit, comprising conductors 5(3, heating element 25, and conductor 57.

The operation of the device is as follows: By closing the switch 35 the starting circuit will be completed, the motor will commence to spin and the driving pinion will come into mesh with gear 32 on the flywheel 33, cansing the engine crankshaft to revolve. The air which is to be carburetted will be drawn in through the air intake 23 of the carburetor 21, by a suction produced by the reciprocating pistons-not shown. If, due to a cold carburetor, the engine does not start immediately, the plunger 45 of the switch 40 may also be depressed, thus breaking the short-circuit around the heating element 25 and causing all of the starting current to pass through the heater. Under these conditions the speed of the motor will be considerably reduced by vir-tueof the resistance 25, which will become hot. The reduction in motor speed will produce a decrease in the amount of air passing into the intake 23, and there will be ample time for the air to be considerably heated by the heating element 25. Thus by heating the air taken into the carburetor in the'manner described,-the process of carburation will be greatly aided and the starting operation rendered much e. sier.

While the electrical heating device has been shown located at the entrance of the air intake to the carburetor, it is to be understood that the heater can be placed in any position whereby, the airwill be heated before being received into the engine.

While the form of mechanism herein shown and described constitutes a preferred form of embodiment of the invention. it is to be understood that other forms mightbe adopted, all coming within the scope of the claims which follow.

What I claim is as follows:

1. In an engine starting system, the combination with an internal-combustion engine having an intake; of a starting motor adapted to be connected with the engine; an

electric heating unit in the intake; a battery; a normally closed pedal switch for short-circuiting said heating unit; and connections between said battery, motor and pedal switch including a normally open pedal switch.

2. In an engine starting system, the combination with an internal-combustion engine having an intake; of a starting motor adapted to be connected with the engine; a normally inoperative electric heating unit in the intake; a battery; means for rendering the motor operative while permitting the heater to remain inoperative; and means for rendering the heater operative, said last named means being effective only when the motor is connected to the battery.

In testimony whereof I aflix my signature.

ELMER H. SOHWARZ.

Witnesses:

J. W. MCDONALD,

IRVIN A. GREENWALD. 

